Odaily Planet Daily News According to Trader T's monitoring, in December, the net inflow of Bitcoin spot ETFs in the U.S. was $4.586 billion, including: - BlackRock IBIT increased its holdings by 51,538 BTC, currently holding 551,918 BTC, with an inflow of $5.53 billion (the same as last month); - Fidelity FBTC had an inflow of $267 million; - Grayscale had an outflow of $866 million (GBTC outflowed $976 million, BTC inflowed $110 million).